Most failures in a furnace wire harness stem from terminal corrosion

optimized for stable flame rectification and consistent main burner lighting

flame proving

it preserves critical system settings and operating history through power cycles

York S1-373-03481-717 Wire 322027-701 Most failures in a furnaceThe York S1 373 03481 717 is a specialized 18AWG flame sensor wire engineered to maintain signal integrity within the high temperature environment of a furnace burner transition. For technicians diagnosing ignition failures or erratic flame signals, this flame sensor lead wire is critical for ensuring the flame rectification circuit functions within the narrow microamp parameters required by the control board. The 18 gauge conductor is wrapped in high